20661

Appears in sequences

• Number of nondecreasing arrays of n 0..n-1 integers with the sum of their 3rd powers equal to sum(i^3,i=0..n-1).at n=15A216631
• Solution of the complementary equation a(n) = a(n-1) + a(n-2) + b(n-1), where a(0) = 1, a(1) = 3, b(0) = 2, b(1) = 4.at n=17A293358
• The number of odd abundant numbers below 10^n.at n=6A322287
• Products p*q*r of three distinct primes such that (p*q) mod r, (p*r) mod q and (q*r) mod p are all prime.at n=22A338704